6.  The applicants were born in 1977 and 1971 respectively and live in London.
7.  Between 9 and 12 September 2003 there was a Defence Systems and Equipment International Exhibition (“the arms fair”) at the Excel Centre in Docklands, East London, which was the subject of protests and demonstrations.
8.  At about 10.30 a.m. on 9 September 2003 the first applicant was riding a bicycle and carrying a rucksack near the arms fair, on his way to join the demonstration. He was stopped and searched by two police officers who told him he was being searched under section 44 of the Terrorism Act 2000 (“the 2000 Act”: see paragraphs 28-34 below) for articles which could be used in connection with terrorism. He was handed a notice to that effect. The first applicant claimed he was told in response to his question as to why he was being stopped that it was because a lot of protesters were about and the police were concerned that they would cause trouble. Nothing incriminating was found (although computer printouts giving information about the demonstration were seized by the officers) and the first applicant was allowed to go on his way. He was detained for roughly 20 minutes.
9.  At about 1.15 p.m. on 9 September 2003, the second applicant, wearing a photographer's jacket, carrying a small bag and holding a camera in her hand, was stopped close to the arms fair. She had apparently emerged from some bushes. The second applicant, a journalist, was in the area to film the protests. She was searched by a police officer from the Metropolitan Police notwithstanding that she showed her press cards to show who she was. She was told to stop filming. The police officer told her that she was using her powers under sections 44 and 45 of the 2000 Act. Nothing incriminating was found and the second applicant was allowed to go on her way. The record of her search showed she was stopped for five minutes but she thought it was more like thirty minutes. She claimed to have felt so intimidated and distressed that she did not feel able to return to the demonstration although it had been her intention to make a documentary or sell footage of it.
10.  The applicants sought to challenge the legality of the stop and search powers used against them by way of judicial review. Prior to the High Court hearing, the Secretary of State offered the applicants a procedure which would have enabled the High Court to review in closed session, with the benefit of submissions from a special advocate, the underlying intelligence material which had been the basis for the Secretary of State's decision to confirm the authorisation (section 46 of the 2000 Act: see paragraphs 30-31 below). The applicants, however, indicated that they did not consider it necessary or appropriate to proceed in this way, since they did not intend to challenge the assessment that there was a general threat of terrorism against the United Kingdom. Instead, they contended, first, that the authorisation and confirmation in question, since they formed part of a rolling programme of authorisations covering the entire London area, were ultra vires and unlawful, since there were a number of clear indications that Parliament had intended an authorisation under section 44 of the 2000 Act (“a section 44 authorisation”) to be given and confirmed only in response to an imminent terrorist threat to a specific location in respect of which normal police powers of stop and search were inadequate. Secondly, the applicants claimed that the use of the section 44 authorisation by police officers to stop and search them at the arms fair was contrary to the legislative purpose and unlawful and that the guidance given to police officers was either non-existent or calculated to cause officers to misuse the powers. Thirdly, the applicants claimed that the section 44 authorisations and the exercise of powers under them constituted a disproportionate interference with their rights under Articles 5, 8, 9, 10 and 11 of the Convention.
11.  On 31 October 2003, the Divisional Court dismissed the application ([2003] EWHC 2545). Lord Justice Brooke, giving the judgment of the court, held that Parliament had envisaged that a section 44 authorisation might cover the whole of a police area as a response to a general threat of terrorist activity on a substantial scale and that the authorisation and the subsequent confirmation by the Secretary of State were not ultra vires.
Brooke LJ held as follows, in connection with the applicants' second ground of challenge:
“The powers conferred on the police under section 44 are powers which most British people would have hoped were completely unnecessary in this country, particularly in time of peace. People have always been free to come and go in this country as they wish unless the police have reasonable cause to stop them. Parliament has, however, judged that the contemporary threats posed by international terrorism and dissident Irish terrorism are such that as a people we should be content that the police should be able to stop and search us at will for articles that might be connected with terrorism.
It is elementary that if the police abuse these powers and target them disproportionately against those whom they perceive to be no particular friends of theirs the terrorists will have to that extent won. The right to demonstrate peacefully against an arms fair is just as important as the right to walk or cycle about the streets of London without being stopped by the police unless they have reasonable cause. If the police wish to use this extraordinary power to stop and search without cause they must exercise it in a way that does not give rise to legitimate complaints of arbitrary abuse of power.
We are not, however, satisfied that the police's conduct on 9th September entitles either Mr Gillan or Ms Quinton to a public law remedy. There is just enough evidence available to persuade us that, in the absence of any evidence that these powers were being habitually used on occasions which might represent symbolic targets, the arms fair was an occasion which concerned the police sufficiently to persuade them that the use of section 44 powers was needed ... . But it was a fairly close call, and the Metropolitan Police would do well to review their training and briefing and the language of the standard forms they use for section 44 stop/searches if they wish to avoid a similar challenge in future. ...”
Finally, the court found that the powers were provided for by law and not disproportionate, given the risk of terrorist attack in London.
12.  The Court of Appeal gave judgment on 29 July 2004 ([2004] EWCA Civ 1067). As to the proper interpretation of the legislation, it held that:
“It is clear that Parliament, unusually, has permitted random stopping and searching, but, as we have already indicated when examining the language of the relevant sections, made the use of that power subject to safeguards. The power is only to be used for a single specified purpose for a period of an authorisation granted by a senior officer and confirmed by the Secretary of State. Furthermore, the authorisation only has a limited life unless renewed.
We do not find it surprising that the word 'expedient' should appear in section 44(3) in conjunction with the power to authorise. The statutory scheme is to leave how the power is to be used to the discretion of the senior officer. In agreement with the Divisional Court, we would give the word its ordinary meaning of advantageous. It is entirely consistent with the framework of the legislation that a power of this sort should be exercised when a senior police officer considers it is advantageous to exercise the power for the prevention of acts of terrorism.
Interpreted in this way, sections 44 and 45 could not conflict with the provisions of the Articles of the ECHR. If those Articles were to be infringed it would be because of the manner of the exercise of the power, not its existence. Any possible infringement of the ECHR would depend on the circumstances in which the power that the sections give is exercised.”
13.  The Court of Appeal did not consider it necessary to determine whether Article 5 § 1 applied, since it held that any deprivation of liberty was justifiable under Article 5 § 1(b). However it held that, if the point had to be decided, the better view was that there was no deprivation of liberty, taking into account the likely limited nature of any infringement in a normal stop and search and the fact that the main aim would not be to deprive an individual of his liberty but rather to effect a verification of one form or another. Nor did it consider that Articles 10 and 11 applied. Although the applicants' evidence gave some cause for concern that the power had been used against them to control or deter their attendance at the demonstration, those issues had not been tested because the thrust of their argument was directed at the conformity of the legislation with the Convention and, properly used as a measure of limited duration to search for articles connected with terrorism, the stop and search power would not impinge on the rights to freedom of expression or assembly.
14.  The respondent Commissioner of the Metropolitan Police had conceded that the stop and search measures amounted to interferences with the applicants' Article 8 rights, and the Court of Appeal accepted that this was the correct approach, describing section 44 as “an extremely wide power to intrude on the privacy of the members of the public”. It considered that the interference was, however, in accordance with the law, for the following reasons:
“'The law' that is under criticism here is the statute, not the authorisation. That law is just as much a public record as is any other statute. And the provisions are not arbitrary in any relevant sense. Although the police officer does not have to have grounds for suspecting the presence of suspicious articles before stopping a citizen in any particular case (section 45(1)(b)), he can only be authorised to use those powers for limited purposes, and where a decision has been made that the exercise of the powers is expedient for the serious purpose of the prevention of acts of terrorism (section 44(3)). The system, so controlled, cannot be said to be arbitrary in any sense that deprives it of the status of 'law' in the autonomous meaning of that term as understood in Convention jurisprudence. In addition, while the authorisations and their confirmation are not published because not unreasonably it is considered publication could damage the effectiveness of the stop and search powers and as the individual who is stopped has the right to a written statement under section 45(5), in this context the lack of publication does not mean that what occurred was not a procedure prescribed by law.”
 Furthermore, given the nature of the terrorist threat against the United Kingdom, the authorisation and confirmation of the power could not, as a matter of general principle, be said to be disproportionate: the disadvantage of the intrusion and restraint imposed on even a large number of individuals by being stopped and searched could not possibly match the advantage that accrued from the possibility of a terrorist attack being thereby foiled or deterred. Having regard to the nature of the arms fair, its location near an airport and a previous site of a terrorist incident (connected with the Northern Ireland problems) and the fact that a protest was taking place, the police were entitled to decide that section 44 powers should be exercised in connection with it. However, the inadequacy of the evidence provided by the police concerning the use of the section 44 power in the vicinity of the arms fair made it impossible to come to any conclusion as regards the lawfulness and proportionality of the use of the power against the applicants.
15.  The House of Lords, on 8 March 2006, unanimously dismissed the applicants' appeals ([2006] UKHL 12). Lord Bingham, with whom the other Lords agreed, began by observing:
“1. It is an old and cherished tradition of our country that everyone should be free to go about their business in the streets of the land, confident that they will not be stopped and searched by the police unless reasonably suspected of having committed a criminal offence. So jealously has this tradition been guarded that it has almost become a constitutional principle. But it is not an absolute rule. There are, and have for some years been, statutory exceptions to it. These appeals concern an exception now found in sections 44-47 of the Terrorism Act 2000 ('the 2000 Act'). The appellants challenge the use made of these sections and, in the last resort, the sections themselves. Since any departure from the ordinary rule calls for careful scrutiny, their challenge raises issues of general importance.”
16.  The first issue before the House of Lords was as to the proper construction of the statute. The applicants had argued that section 44(3) should be interpreted as permitting an authorisation to be made only if the decision-maker had reasonable grounds for considering that the powers were necessary and suitable, in all the circumstances, for the prevention of terrorism. Lord Bingham rejected this interpretation, since the word “expedient” in the section had a meaning quite distinct from “necessary”. He continued:
“14. ... But there are other reasons also for rejecting the argument. It is true, as already recognised, that section 45(1)(b), in dispensing with the condition of reasonable suspicion, departs from the normal rule applicable where a constable exercises a power to stop and search. One would therefore incline, within the permissible limits of interpretation, to give 'expedient' a meaning no wider than the context requires. But examination of the statutory context shows that the authorisation and exercise of the power are very closely regulated, leaving no room for the inference that Parliament did not mean what it said. There is indeed every indication that Parliament appreciated the significance of the power it was conferring but thought it an appropriate measure to protect the public against the grave risks posed by terrorism, provided the power was subject to effective constraints. The legislation embodies a series of such constraints. First, an authorisation under section 44(1) or (2) may be given only if the person giving it considers (and, it goes without saying, reasonably considers) it expedient 'for the prevention of acts of terrorism'. The authorisation must be directed to that overriding objective. Secondly, the authorisation may be given only by a very senior police officer. Thirdly, the authorisation cannot extend beyond the boundary of a police force area, and need not extend so far. Fourthly, the authorisation is limited to a period of 28 days, and need not be for so long. Fifthly, the authorisation must be reported to the Secretary of State forthwith. Sixthly, the authorisation lapses after 48 hours if not confirmed by the Secretary of State. Seventhly, the Secretary of State may abbreviate the term of an authorisation, or cancel it with effect from a specified time. Eighthly, a renewed authorisation is subject to the same confirmation procedure. Ninthly, the powers conferred on a constable by an authorisation under sections 44(1) or (2) may only be exercised to search for articles of a kind which could be used in connection with terrorism. Tenthly, Parliament made provision in section 126 for reports on the working of the Act to be made to it at least once a year, which have in the event been made with commendable thoroughness, fairness and expertise by Lord Carlile of Berriew QC. Lastly, it is clear that any misuse of the power to authorise or confirm or search will expose the authorising officer, the Secretary of State or the constable, as the case may be, to corrective legal action. 15. The principle of legality has no application in this context, since even if these sections are accepted as infringing a fundamental human right, itself a debatable proposition, they do not do so by general words but by provisions of a detailed, specific and unambiguous character. Nor are the appellants assisted by the Home Office circular. This may well represent a cautious official response to the appellants' challenge, and to the urging of Lord Carlile that these powers be sparingly used. But it cannot, even arguably, affect the construction of section 44(3). The effect of that sub-section is that an authorisation may be given if, and only if, the person giving it considers it likely that these stop and search powers will be of significant practical value and utility in seeking to achieve the public end to which these sections are directed, the prevention of acts of terrorism.”
17.  Lord Bingham rejected the applicants' contention that the “rolling programme” of authorisations had been ultra vires, as follows:
“18. The appellants' second, and main, ground of attack was directed to the succession of authorisations which had had effect throughout the Metropolitan Police District since February 2001, continuing until September 2003. It was, they suggested, one thing to authorise the exercise of an exceptional power to counter a particular and specific threat, but quite another to authorise what was, in effect, a continuous ban throughout the London area. Again this is not an unattractive submission. One can imagine that an authorisation renewed month after month might become the product of a routine bureaucratic exercise and not of the informed consideration which sections 44 and 46 clearly require. But all the authorisations and confirmations relevant to these appeals conformed with the statutory limits on duration and area. Renewal was expressly authorised by section 46(7). The authorisations and confirmations complied with the letter of the statute. The evidence of the Assistant Commissioner and Catherine Byrne does not support, and indeed contradicts, the inference of a routine bureaucratic exercise. It may well be that Parliament, legislating before the events of September 2001, did not envisage a continuous succession of authorisations. But it clearly intended that the section 44 powers should be available to be exercised when a terrorist threat was apprehended which such exercise would help to address, and the pattern of renewals which developed up to September 2003 (it is understood the pattern has since changed) was itself a product of Parliament's principled refusal to confer these exceptional stop and search powers on a continuing, countrywide basis. Reporting on the operation of the 2000 Act during the years 2002 and 2003, Lord Carlile ...found that sections 44 and 45 remained necessary and proportional to the continuing and serious risk of terrorism, and regarded London as 'a special case, having vulnerable assets and relevant residential pockets in almost every borough'.”
18.  On the question whether either applicant had been deprived of liberty as a result of the stop and search procedure, Lord Bingham commented on the absence of any decision of the European Court of Human Rights on closely analogous facts and accepted that there were some features indicative of a deprivation of liberty, such as the coercive nature of the measure. However, since the procedure would ordinarily be relatively brief and since the person stopped would not be arrested, handcuffed, confined or removed to any different place, such a person should not be regarded “as being detained in the sense of confined or kept in custody, but more properly of being detained in the sense of kept from proceeding or kept waiting”. Article 5 did not, therefore, apply.
19.  As to the question whether Article 8 was applicable, Lord Bingham was:
“28. ... doubtful whether an ordinary superficial search of the person can be said to show a lack of respect for private life. It is true that 'private life' has been generously construed to embrace wide rights to personal autonomy. But it is clear Convention jurisprudence that intrusions must reach a certain level of seriousness to engage the operation of the Convention, which is, after all, concerned with human rights and fundamental freedoms, and I incline to the view that an ordinary superficial search of the person and an opening of bags, of the kind to which passengers uncomplainingly submit at airports, for example, can scarcely be said to reach that level.”
20.  Lord Bingham did not consider that the power to stop and search under sections 44-45, properly used in accordance with the statute and Code A, could be used to infringe a person's rights under Articles 10 or 11 of the Convention.
21.  Despite his doubts as to the applicability of Articles 5, 8, 10 or 11, Lord Bingham went on to consider whether the stop and search powers complied with the requirement of “lawfulness” under the Convention, as follows:
“34. The lawfulness requirement in the Convention addresses supremely important features of the rule of law. The exercise of power by public officials, as it affects members of the public, must be governed by clear and publicly-accessible rules of law. The public must not be vulnerable to interference by public officials acting on any personal whim, caprice, malice, predilection or purpose other than that for which the power was conferred. This is what, in this context, is meant by arbitrariness, which is the antithesis of legality. This is the test which any interference with or derogation from a Convention right must meet if a violation is to be avoided. 35. The stop and search regime under review does in my opinion meet that test. The 2000 Act informs the public that these powers are, if duly authorised and confirmed, available. It defines and limits the powers with considerable precision. Code A, a public document, describes the procedure in detail. The Act and the Code do not require the fact or the details of any authorisation to be publicised in any way, even retrospectively, but I doubt if they are to be regarded as 'law' rather than as a procedure for bringing the law into potential effect. In any event, it would stultify a potentially valuable source of public protection to require notice of an authorisation or confirmation to be publicised prospectively. The efficacy of a measure such as this will be gravely weakened if potential offenders are alerted in advance. Anyone stopped and searched must be told, by the constable, all he needs to know. In exercising the power the constable is not free to act arbitrarily, and will be open to civil suit if he does. It is true that he need have no suspicion before stopping and searching a member of the public. This cannot, realistically, be interpreted as a warrant to stop and search people who are obviously not terrorist suspects, which would be futile and time-wasting. It is to ensure that a constable is not deterred from stopping and searching a person whom he does suspect as a potential terrorist by the fear that he could not show reasonable grounds for his suspicion. It is not suggested that the constables in these cases exercised their powers in a discriminatory manner (an impossible contention on the facts), and I prefer to say nothing on the subject of discrimination.”
22.  Lord Hope of Craighead agreed with Lord Bingham. In particular, he considered that the stop and search power complied with the principle of legality for the following reasons:
“48. The sight of police officers equipped with bundles of the stop/search form 5090 which is used to record the fact that a person or vehicle was stopped by virtue of sections 44(1) or 44(2) has become familiar in Central London since the suicide bombings that were perpetrated on 7 July 2005 and the attempts to repeat the attacks two weeks later. They can be seen inside the barriers at stations on the London Underground, watching people as they come through the barriers and occasionally stopping someone who attracts their attention and searching them. Most people who become aware of the police presence are there because they want to use the transport system. The travelling public are reassured by what they see the police doing at the barriers. They are in the front line of those who would be at risk if there were to be another terrorist outrage. But those who are singled out, stopped and searched in this way may well see things differently. They may find the process inconvenient, intrusive and irritating. As it takes place in public, they may well also find it embarrassing. This is likely to be the case if they believe, contrary to the facts, that they are being discriminated against on grounds of race. These features of the process give rise to this question. Are the limits on the use of the power sufficient to answer a challenge that the Convention rights of the person who is searched are being violated because its use is unforeseeable and arbitrary? 49. From that person's perspective the situation is one where all the cards are in the hands of the police. It is they, and not the general public, who know that an authorisation is in force and the area that it relates to. It is they who decide when and where within that area they should exercise the power that has been given to them. It is they who decide which persons or which vehicles should be stopped and searched. Sections 44(1) and 44(2) make it clear that the power may be exercised only by a constable in uniform. Section 45(1)(a) provides that the power may be exercised only for the purpose of searching for articles of a kind which could be used in connection with terrorism. But no criterion is laid down in the statute or in any published document as to the precise state of mind that the constable must be in before the power can be exercised. 50. Section 45(1)(b) provides that the power may be exercised whether or not the constable has grounds for suspecting the presence of articles of a kind which could be used in connection with terrorism. The definition of the word 'terrorism' for the purposes of the Act is a wide one, and the matter is left to the judgment of each individual police officer. The first indication that members of the public are likely to get that they are liable to be stopped and searched is when the order to stop is given. Those who are well informed may get some indication as to what is afoot when they see the police with bundles of forms in their hands looking in their direction. But for most people the order to stop will come as a surprise. Unless they are in possession of articles of the kind that the constable is entitled to search for, they may well wonder why they have been singled out for the treatment that they are being subjected to. 51. There is, of course, a strong argument the other way. If the stop and search procedure is to be effective in detecting and preventing those who are planning to perpetrate acts of terrorism it has to be like this. Advertising the time when and the places where this is to be done helps the terrorist. It impedes the work of the security services. Sophisticated methods of disguise and concealment may be used where warnings are given. Those involved in terrorism can be expected to take full advantage of any published information as to when and where the power is likely to be exercised. So the police need to be free to decide when and where the use of the procedure is to be authorised and whom they should stop on the spur of the moment if their actions are to be a step ahead of the terrorist. Must this system be held to be unlawful under Convention law ... on the ground that it is arbitrary?
... 55. ... The use of the section 44 power has to be seen in the context of the legislation that provides for it. The need for its use at any given time and in any given place to be authorised, and for the authorisation to be confirmed within 48 hours, provides a background of law that is readily accessible to the citizen. It provides a system of regulatory control over the exercise of the power which enables the person who is stopped and searched, if he wishes, to test its legality in the courts. In that event the authorisation and the confirmation of it will of necessity, to enable the law to be tested properly, become relevant evidence. The guidance in para 2.25 of Code A warns the constable that the power is to be used only for reasons connected with terrorism, and that particular care must be taken not to discriminate against members of minority ethnic groups when it is being exercised. It is no more precise than that. But it serves as a reminder that there is a structure of law within which the power must be exercised. A constable who acts within these limits is not exercising the section 44 power arbitrarily. 56. As the concluding words of para 67 of the decision in Malone v United Kingdom (1985) 7 EHRR 14 indicate, the sufficiency of these measures must be balanced against the nature and degree of the interference with the citizen's Convention rights which is likely to result from the exercise of the power that has been given to the public authority. The things that a constable can do when exercising the section 44 power are limited by the provisions of section 45(3) and 45(4). He may not require the person to remove any clothing in public except that which is specified, and the person may be detained only for such time as is reasonably required to permit the search to be carried out at or near the place where the person or vehicle has been stopped. The extent of the intrusion is not very great given the obvious importance of the purpose for which it is being resorted to. In my opinion the structure of law within which it is to be exercised is sufficient in all the circumstances to meet the requirement of legality. 57. It should be noted, of course, that the best safeguard against the abuse of the power in practice is likely to be found in the training, supervision and discipline of the constables who are to be entrusted with its exercise. Public confidence in the police and good relations with those who belong to the ethnic minorities are of the highest importance when extraordinary powers of the kind that are under scrutiny in this case are being exercised. The law will provide remedies if the power to stop and search is improperly exercised. But these are remedies of last resort. Prevention of any abuse of the power in the first place, and a tighter control over its use from the top, must be the first priority.”
23.  Lord Brown of Eaton-under-Heywood observed, inter alia:
“74. Given the exceptional (although, as Lord Bingham has explained, neither unique nor particularly novel) nature of [the section 44] power (often described as the power of random search, requiring for its exercise no reasonable suspicion of wrongdoing), it is unsurprisingly hedged about with a wide variety of restrictions and safeguards. Those most directly relevant to the way in which the power impacts upon the public on the ground are perhaps these. It can be used only by a constable in uniform (section 44 (1) and (2)). It can be used only to search for terrorist-connected articles (section 45(1) (a)). The person searched must not be required to remove any clothing in public except for headgear, footwear, an outer coat, a jacket or gloves (section 45(3)). The search must be carried out at or near the place where the person or vehicle is stopped (section 45(4)). And the person or vehicle stopped can be detained only for such time as is reasonably required to permit such a search (section 45(4)). Unwelcome and inconvenient though most people may be expected to regard such a stop and search procedure, and radically though it departs from our traditional understanding of the limits of police power, it can scarcely be said to constitute any very substantial invasion of our fundamental civil liberties. Nevertheless, given, as the respondents rightly concede, that in certain cases at least such a procedure will be sufficiently intrusive to engage a person's article 8 right to respect for his private life, and given too that this power is clearly open to abuse—the inevitable consequence of its exercise requiring no grounds of suspicion on the police officer's part—the way is clearly open to an argument that the scheme is not properly compliant with the Convention requirement that it be 'in accordance with the law.' 75. For this requirement to be satisfied ... not only must the interference with the Convention right to privacy have some basis in domestic law (as here clearly it does in the 2000 Act); not only must that law be adequately accessible to the public (as here clearly it is—unlike, for example, the position in Malone v United Kingdom (1985) 7 EHRR 14); not only must the law be reasonably foreseeable, to enable those affected to regulate their conduct accordingly (a requirement surely here satisfied by the public's recognition, from the very terms of the legislation, that drivers and pedestrians are liable to be subjected to this form of random search and of the need to submit to it); but there must also be sufficient safeguards to avoid the risk of the power being abused or exercised arbitrarily. 76. As I understand the appellants' argument, it is upon this final requirement that it principally focuses: this power, submits Mr Singh, is all too easily capable of being used in an arbitrary fashion and all too difficult to safeguard against such abuse. True, he acknowledges, if the power is in fact abused in any particular case the police officer concerned will be liable to a civil claim for damages (and, no doubt, to police disciplinary action). But, he submits, it will usually be impossible to establish a misuse of the power given that no particular grounds are required for its apparently lawful exercise. Assume, for example, that a police officer in fact exercises this power for racially discriminatory reasons of his own, how could that be established? There are simply no effective safeguards against such abuse, no adequate criteria against which to judge the propriety of its use. Certainly it is provided by paragraph 2.25 of Code A (a published code issued under section 66 of the Police and Criminal Evidence Act 1984) that: 'Officers must take particular care not to discriminate against members of minority ethnic groups in the exercise of these powers'. But, say the appellants, there is simply no way of policing that instruction with regard to the exercise of so wide a random power. No way, that is, submits [counsel for the applicants], unless it is by stopping and searching literally everyone (as, of course, occurs at airports and on entry to certain other specific buildings) or by stopping and searching on a strictly numerical basis, say every tenth person. Only in one or other of these ways, the appellants' argument forces them to contend, could such a power as this be exercisable consistently with the principle of legal certainty: there cannot otherwise be the necessary safeguards in place to satisfy the Convention requirement as to 'the quality of the law' ... 77. I would reject this argument. In the first place it would seem to me impossible to exercise the section 44 power effectively in either of the ways suggested. Imagine that following the London Underground bombings last July the police had attempted to stop and search everyone entering an underground station or indeed every tenth (or hundredth) such person. Not only would such a task have been well nigh impossible but it would to my mind thwart the real purpose and value of this power. That, as Lord Bingham puts it in paragraph 35 of his opinion, is not 'to stop and search people who are obviously not terrorist suspects, which would be futile and time-wasting [but rather] to ensure that a constable is not deterred from stopping and searching a person whom he does suspect as a potential terrorist by the fear that he could not show reasonable grounds for his suspicion.' It is to be hoped, first, that potential terrorists will be deterred (certainly from carrying the tools of their trade) by knowing of the risk they run of being randomly searched, and, secondly, that by the exercise of this power police officers may on occasion (if only very rarely) find such materials and thereby disrupt or avert a proposed terrorist attack. Neither of these aims will be served by police officers searching those who seem to them least likely to present a risk instead of those they have a hunch may be intent on terrorist action. 78. In his 2001 review of the operation of the Prevention of Terrorism (Temporary Provisions) Act 1989 (amended as explained by Lord Bingham in paragraph 9 of his opinion) and the Northern Ireland (Emergency Provisions) Act 1996, Mr John Rowe QC said this of the power to stop and search those entering or leaving the United Kingdom with a view to finding out whether they were involved in terrorism:
'The “intuitive” stop 38. I should explain what I mean by an “intuitive stop”. It is a stop which is made “cold” or “at random”—but I prefer the words “on intuition”—without advance knowledge about the person or vehicle being stopped. 39. I do not think such a stop by a trained Special Branch officer is “cold” or “random”. The officer has experience and training in the features and circumstances of terrorism and terrorist groups, and he or she may therefore notice things which the layman would not, or he or she may simply have a police officer's intuition. Often the reason for such a stop cannot be explained to the layman.' 79. Later in his review Mr Rowe noted of the more general stop and search powers originally contained in sections 13A and 13B of the 1989 Act that 'these powers were used sparingly, and for good reason'. I respectfully agree that the section 44 power (as it is now) should be exercised sparingly, a recommendation echoed throughout a series of annual reports on the 2000 Act by Lord Carlile of Berriew QC, the independent reviewer of the terrorist legislation appointed in succession to Mr Rowe—see most recently paragraph 106 of his 2005 report, suggesting that the use of the power 'could be cut by at least 50 per cent without significant risk to the public or detriment to policing.' To my mind, however, that makes it all the more important that it is targeted as the police officer's intuition dictates rather than used in the true sense randomly for all the world as if there were some particular merit in stopping and searching people whom the officers regard as constituting no threat whatever. In short, the value of this legislation, just like that allowing people to be stopped and searched at ports, is that it enables police officers to make what Mr Rowe characterised as an intuitive stop. 80. Of course, as the Privy Counsellor Review Committee chaired by Lord Newton of Braintree noted in its December 2003 report on the Anti-Terrorism, Crime and Security Act 2001:
'Sophisticated terrorists change their profile and methods to avoid presenting a static target. For example, al Qaeda is reported to place particular value on recruiting Muslim converts because they judge them to be less likely to be scrutinised by the authorities.'
It seems to me inevitable, however, that so long as the principal terrorist risk against which use of the section 44 power has been authorised is that from al Qaeda, a disproportionate number of those stopped and searched will be of Asian appearance (particularly if they happen to be carrying rucksacks or wearing apparently bulky clothing capable of containing terrorist-related items). 81. Is such a conclusion inimical to Convention jurisprudence or, indeed, inconsistent with domestic discrimination law? In my judgment it is not, provided only that police officers exercising this power on the ground pay proper heed to paragraph 2.25 of Code A:
'The selection of persons stopped under section 44 of Terrorism Act 2000 should reflect an objective assessment of the threat posed by the various terrorist groups active in Great Britain. The powers must not be used to stop and search for reasons unconnected with terrorism. Officers must take particular care not to discriminate against members of minority ethnic groups in the exercise of these powers. There may be circumstances, however, where it is appropriate for officers to take account of a person's ethnic origin in selecting persons to be stopped in response to a specific terrorist threat (for example, some international terrorist groups are associated with particular ethnic identities).'
Ethnic origin accordingly can and properly should be taken into account in deciding whether and whom to stop and search provided always that the power is used sensitively and the selection is made for reasons connected with the perceived terrorist threat and not on grounds of racial discrimination.”
24.  The applicants also commenced a claim in the County Court on 8 September 2004 for, inter alia, damages under the Human Rights Act 1998 on the basis that the police had used the stop and search powers unlawfully against each applicant and in breach of Articles 8, 10 and 11 of the Convention, to control or deter their attendance at the demonstration rather than to search for articles linked to terrorism. The claims were stayed pending the outcome of their appeal to the House of Lords and were finally heard in February 2007. The County Court rejected the applicants' claims and determined that the power had, in respect to each of them, been properly and lawfully exercised. The applicants did not seek to appeal against this judgment.